Hoisting apparatus for scaffolds.



J. E. GOODWILL.

HOISTING APPARATUS FOR SCAFFOLDS. APPLICATION FILED JAN.20| 191 1,28 l,0 1 Patented June 26, 1917.

2 SHEETS-SHEET I- attoznm J. E. GOODWILL.

HOISTING APPARATUS FORISCAFFOLDS.

APPLICATION FILED JAN-20.19M-

2 SHEETS-SHEET 2.

E STAT JASPER E. GOODWILL, OF OMAHA, NEBRASKA.

HOIS TING APPARATUS FOR SCAFFOLDS. I

Specification of Letters Patent.

. Patented June 26,1917.

Application filed January 20, 1917. Serial No. 143,458.

' Omaha, inthe county of Douglas and State of Nebraska, have inventedcertain new and useful Improvements in a Hoisting Apparaf tus forScafiolds, of which the following is a specification.

The invention relates-to a hoist ng apparatus forscaflfolds, and has forits ob ect,

broadly, to provide apparatuses by means of which heavily loadedscaflolds may be readily elevated or lowered, the parts to.be few andsimple so that they may be manufactured economically, will be efiicientoperation, and durable and convenient n use.

The invention consists of the novel construction, combination andarrangement of parts as described herein and claimed and.

as illustrated in the accompanying -drawing, wherein,-

Figure 1 is a view in side elevation of the apparatus and Fig. 2 is aView of the.

same in longitudinal section, parts of the upper gripping member beingdisposed in engagement with the cable, .and the parts of the lowergripping member bein shown in disengaged relation with the cab e. Fig.

3 is a view of the apparatus in longitudinal section taken at rightangles to the view shown in Fig.' 2, as on line 3 3 ofFig. 2. Fig. 4 isa plan view of one of the operating or hand levers.

Iteferring now to the drawing fora more particular description, numeral5 indicates alower gripping member, and at 6 is indicated an uppergripping member, each being adapted, normal y, to engage or grip theelongated, upright support 7 by action of the opposed springs 8, andadapted to' be I released from said support by manually pressingupwardly upon a hand-lever, 9.

While the elongated support 7 is shown as a cable, it will be understoodthat operation of the apparatus would be substantially the same ifelongated bars, strap-iron, pipe or strands were em loyed, thesesupports being of any require length to reach to the top of a wall orbuilding, if necessary, their upper ends in all instances being securedat some distance above the scaflfold 10 which carries the load. I

' Calling attention tothe gripping member 6, said members 5 and 6 beingidentically the same in construction, numerals 11 indicate a pair ofopposed, rectangular plates,

and between their lower ends is disposed, to project outwardly thereof,a pair of opposed arms 12, preferably secured thereto by bolts 13.

At 14 and 1,4 are indicated a pair of op- 17 carried by the plates. 11,and it will be understood that stresses directed downwardly of thescaffold will automatically cause the toothed or milled sectors toengage orgrip the cable as means, additional to the first named sectors,for supporting said scafi'old. p a

I employ a plurality of verticallinks, these being arranged in pairs, asthe pairs 18 and 19,- the' pair of links 18 a pivotal connection bymeans of bolts 20 with and between the ends of-the lever-sectors l4, andthe pair of links: 19'having a similar connection 21 with thelever-sectors l4. tioned are pivotally connected with a pairofcross-bars 22.

The hand-lever 9 is pivotally mounted at its inner end upon the plates11 as indicatedjat 23, and is fulcrumed at 24 upon a coupling bar 25,the latter having a pivotal connection, as indicated at 26 upon theouter end of the lever-sector 16'. At 9? is indicated a lever having itsinner end pivotally connected with the plates 11, as

The lower ends of the links menindicated at 23, its outer end having apivotal connection 24' with a coupling bar 25-, the latterbeingpivotally connected, as indicated'at 26" with the outer end of aleversector 16. Numerals 27 indicate bolts for securing the platesiltogether and in s aced relation. In this connection it should be statedthat levers 9, 9 and the operating lever 32, in form, are substantiallyas shown in, Fig. 4, the arms w-being suitably spaced apart forengaginglthe parts with whichv they are connected.

Since the parts thus for described for the gripping-member 6 areidentical in const'ruction and arrangement with "the parts of thegripping-member'5, it is not considered necessary to particularlydescribe the construction of the gripping-member 5. While I have shownbolts for the pivotal connections, I do not wish to be understood aslimiting myself in this respect, but bolts are preferred since the partsof each gripping-member may be conveniently assembled, and if required,

they may be readily disconnected.

In order that the gripping-members 5 and 6 may be connected and may beoperated in a manner to elevate or to lower the scaffold the lowermember, 5 is provided with the pair of side-bars 28, their lower endsbeing secured to'the scafiold by, any suitable means,

, the means herein shown being the bolt 29' traversing the spacingmember or sleeve 30, said side-bars projecting somewhat above the plates11to provide a pivotal mounting'3l for the operating-lever 32,'thecross-bars 22 of member 6 being provided with the pair of links oractuating-arms 33 having. pivotal connections 34: with said cross-bars.

Numerals 35 indicate the pivotal mountings for the lever-sectors 16 and16 upon the respective pairs of links 18 and 19. Numerals 36-indicatethe pivotal mountings of the last named'links upon the cross-bar 22.

Numerals 37 indicate the pivotal mounting of the operating lever 32 uponthelinks '33.

At 38 (Figs. 1, 3,) is indicated the pivotal connection for the innerends of the handlever 9'and 9 Straps 39 are employed as additionalholding means for links 28, said straps being, disposed on the outersides-pf said'links, near their upper ends and conwith the cable sincethe opposed springs 8 cause the milled parts of the sectors to make Ithis engagement; and it is obvious that any increase-in the weight ofthe scaflold will cause an increased degree of pressure of the sectorsagainst the cable to prevent any.

movement of the members 5 and 6 longitudinally thereof.

In operatiomthe scaffold may be readily and conveniently elevated by.use-of the ap-.

paratus. To accomplish this, the sectors of the lower gripping-member 5are first disposed as shown in Fig. 2 for the'upper gripping-member 6,so that the sectors of said member 5 will engage the cable 7, the weightof the scaffold thereby being sustained by the member 5. The operatorthen swings the lever 9 of'member 6 upwardly a limited distance, againstthe resistance of springs 8,

so that the sectors of said member 6will be.

released from the cable, and also causes an upward swinging movement ofthe operating lever 32 to elevate member 6, which, upon releasing thehand lever 9 of said upper member 6, will permit the sectors of saidupper member 6 to immediately engage the cable. The operator then causesan upward swinging movement of the hand lever 9 of member 5 forreleasing the sectors of said member from the cable, and by imparting adownward swinging movement'to the hand lever 32, said member 5 will,together with the scaffold, be elevated; and the operation 'may berepeated for elevating the scaffold any required distance longitudinallyof the cable.

To lower the scafiold the operation is the reverse to that justdescribed; that is to say,

the upper member 6, by use of its lever 9.

and the lever 32, is lowered, after which the scaffold is lowered by useof the lever 9 of the lower member 5, the lever 32 being permitted toswing gradually upward, the scaffold thereupon moving downwardly freefrom shocks or undue vibration, this last operation being repeated untilthe scaffold has been lowered a required distance longitudinally of thecable. h

By the construction as described, if it is desired to increase thedistance to which the scafiold may be shifted at each operation, it isobvious that this maybe accomplished by increasing the distance betweenthe pivotal mountings 31 and 37, and in constructing the apparatuses,this distance may be conveniently adjusted -by use of apertures 40formed in the-lever 32 for the insertion of the pivot 37, depending uponthe size or weight of the-scaffold and amount of material to besupported or hoisted.

- While I have shown and described two [opposed plates 11, and preferthe use of two, the apparatus would be operative if a single plate wasemployed and therefore I do not wish'to limit myself in this respect,

and it is understood that size, form and proportion, and minor detailsof construction may be changed, if desired, since I have illustratedonlyone embodiment of the indetermined by the appended claims.

'Iclaim:

1. In a scaffold hoisting apparatus, the

combination with an upright elongated support, of an upper grippingmember, and a 7 lower gripping member, each grlpping mem- 'vention, thescope of said-invention being her consisting of a pair of connectedplates upon-opposed sides of the support, a pair of opposed armsprojecting outwardly of and connected with said plates, a pair ofopposed, toothed lever-sectors between and from said support, and meansfor moving one of said gripping members longitudinally of the supportafter its lever-sectors have been released.

2. In a scaffold hoisting apparatus, the combination with an upright,elongated support, of an upper gripping-member, and a lowergripping-member, ea ch gripping-memher being provided with a plate, apair'of opposed toothed lever-sectors eccentrically mounted on saidplate, resilient means for causing normal engagement of the leversectorswith the support to prevent a movement of the gripping-memberslongitudinally thereof, a second pair of opposed, toothed lever-sectorseccentrically mounted on said plate, links pivotally connected with saidlever-sectors, means for moving the links against the action of saidresilient means for releasing the lever-sectors from said support, andmeans for moving one of said gripping-members longitudinally of thesupport after its lever-sectors have been released.

3. Ina scaflold hoisting apparatus, the combination with anupright,elongated support, of an upper gripping-member, and a lowergripping-member, each gripping-member being provided with a plate, apair of opposed arms projecting outwardly of and rigidly connected withsaid plate, a pair of opposed, toothed lever-sectors eccentricallymounted on said plate, springs connecting the arms and saidlever-sectors for causing normal engagement of said lever-sectors withthe support to prevent a movement of the gripping-members longitudinallyof said support, a second pair of opposed, toothed lever-sectorseccentrically mounted onsaid plate, links pivotally connected with saidlever-sectors, means for moving the links against the action of thesprings for releasing thelever-sectors from said support, and means formoving one of said grippingmembers' longitudinally of the support afterits lever-sectors have been released.

4. In' a scaffold hoisting apparatus, the combination with an upright,elongated support, of an upper gripping-member, and a' lowergripping-member, each gripping-memberconsisting ofa pair of connectedplates upon opposed sides of the support, a pair of opposedlever-sectors between and ectuating &

resilient means for releasing the leversectors from said support, andmeans for a moving one of said gripping-members longitudinally of thesupport after its leversectors have been released.

5. In'a1 scafiold hoisting apparatus, the combination with a suspendedcable, of a gripping-member, and a second grippingmember, eachconsisting of a pair of connected plates upon opposed sides of ,thecable, a pair of opposed arms projecting outwardly of and connected withsaid plates, a pair of opposed lever-sectors betweenand eccentricallymounted on said plates, springs connecting the arms and saidlever-sectors for causing normal engagement of the lever sectors withthe cable to prevent a move: ment of the gripping-members longitudinallyof said cable, a second pair of opposed lever-sectors between andeccentrically mounted on said plates, links arranged in pairs, each pairof links being provided with a cross-bar and having pivotal connectionswith said lever sectors, means for mov'ingthe links against the actionof the springs for releasing the lever-sectors from said cable, a pairof actuating-arms pivotally gripping-member and the actuating-arms ofthelinks of the second gripping-member for moving one of saidgripping-members longitudinally of the cable after its lever-sectorshave been released.

'6. a scaffold hoisting apparatus, the combination with a suspendedcable of a gripping-member, and a second gripping- .member, eachincluding a plate, a pair of opposed lever-sectors eccentrically mountedon the plate, resllient means for causing normal, engagement of thelever-sectors with connected with the cross-bars of the-second vgripplng-memb'er, and an operating-lever the 'cable to prevent amovement of the gripping-members longitudinally thereof, a second palrof opposed lever-sectors eccentrlcally mounted on said plate, linksconnected/at one of their ends and having pivotal connections with saidlever-sectors, means for movlng the links against'lthe action of theresilient means for releasing the lever-sectors from the cable, a pairof acwith t e connectedlinks of the second gripplng-rnember, and anoperating-lever havlng pivotal connections with the first griparmshaving pivotal connections ping-member for moving one of saidgrippmg-members longitudinally of the cable after the lever-sectorsthereof have-been released.

h 7. In a scaffold hoisting apparatus, the

confloination with a supporting cable, of a gripping-member, and aSecondgnppihgmember, each gripping-member including a pair 'of connectedplates, a air of opposed ever-sectors between an eccentrlcally mountedon the plates, resilient means for causing normal engagement of theleversectors with. the cable to prevent movements of thegripping-members" longitudinallythereof, a secon pair of opposedleversectors between and eccentrically mounted on said plates, linksarranged in pairs and pivotally connected with said lever-sectors,

a plurality of cross-bars, each having a pivotal connection with 'thelinks of a pair,

mea s for moving the links against the ac tion of said resilient meansfor releasing the lever-sectors from the cable, apair' of actuating-armshaving pivotal connections with the first 'grippingrmember and'with,said actuating-arms for moving one of said gripping-memberslongitudinally of the cable after the lever-sectors thereof have beenreleased, and means to adjust the pivotal connection of saidactuating-arms longitudinally of the operating-lever.-

8. In means for'hoisting' scaffolds upon cables, a gripping-memberconnected with the scaffold, a second gripping-member,

each of said gripping-members consisting of a pair of opposed, connectedplates, leversect'ors arranged in pairs between. and eccentricallymounted upon'j the plates, resilient means for causing normal engagementof the lever-sectors with the cable, members arranged .to have upwardswinging movements for disengaging the lever-sectors from the cable, andan operating-lever disposed between and connected with saidgrippmgmembers, said lever being movable for increasing or. decreasingthe distance between .the gripping-members.

gripping-members and being movable for increaslng or decreasing thedistance between said gripping-members. I

10. In means for'hoisting-scafi'olds upon cables, a gripping-memberconnected. with the scafiold, a second gripping-member, each of saidgripping-members consisting of a pair of connected plates upon opposedsides of thecable, lever-sectors arranged in' pairs between andeccentrically mounted on the plates, links pivotally mounted on thesectorlevers, springs for normally causing engagement of thesector-levers with the'cable, means for causing co-incident movements:of the links'for disengaging-the lever sec tors from the cable, andmeans for increasing or .decreasingthe distance between the. first namedgripping-member and second gripping-member while the lever-sectors ofone gripping-member are in engagement I with the cable.

In testimony whereof, I have affixed my presence of two witnesses.JASPER E. GOODWILL. Witnesses:

HmAMA. STU'RGES, G; S- GFQDWILL- signature in

